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1975 GMC Eleganza Barn find [message #332308] Sat, 19 May 2018 14:16 Go to next message
Woodstock is currently offline  Woodstock   United States
Messages: 2
Registered: May 2018
Location: Lander, WY
Karma: 0
Junior Member
Hi everyone,

I'm new to the site!

Came across this unit & am seriously thinking about buying it. Seems to be in good shape but hasn't ran in a few years & hasn't really been used much the last 6 years. Was able to get it started with some fresh gas in the carb - but won't keep running - stinks like turpentine. Any good ideas on how to get the bad fuel out of the system?

Another question - can you pump the air suspension up without running the compressor/pump?

Thanks,
Would like to post some pics but doesn't seem to be an easy way to do this!
Re: 1975 GMC Eleganza Barn find [message #332314 is a reply to message #332308] Sat, 19 May 2018 15:37 Go to previous messageGo to next message
GMC2000   United States
Messages: 193
Registered: March 2018
Location: Georgia
Karma: -3
Senior Member
old gas gums up carbs so it sounds like it at least needs a carb rebuild and the tanks could be gummed up with tar that will be a constant problem unless they are cleaned aswell.

guys have put shrader valves directly on the air bags so they can pump them up with an air hose.
Re: 1975 GMC Eleganza Barn find [message #332317 is a reply to message #332308] Sat, 19 May 2018 18:39 Go to previous messageGo to next message
Tilerpep is currently offline  Tilerpep   United States
Messages: 404
Registered: June 2013
Location: Raleigh, NC
Karma: 7
Senior Member
Welcome!

Hope it works out to join the GMC world...

The forum is great to search for existing threads, which will be even more helpful if you actually purchase this rig. Go in the top right corner of the web page, put in some search terms until you get some info that is relevant. Such as "fuel system" or what not for any given issue.

As to getting gas out, there are multiple options. There are two tanks, each has a threaded drain plug. Depending on if they move (don't mess up tank if they are stuck and definitely NO heat to loosen!) you can see condition of gas coming out. You can also put a small electric pump inline between the tanks and the engine on a soft hose along the frame rail...or if a PO (previous owner) already plumbed an electric pump in, you can undo the line up near the front frame rail and use a catch can there. If gas still looks like gas, get it out and keep trouble shooting. If gas look like another substance, you may be in for a real start up project to replace tanks.

You can also plumb in a outboard style gas tank right to the main engine fuel pump to get the coach somewhere more suitable to work on if needed.

take a look through gmcmhphotos.com to see and learn a whole bunch of stuff, also searchable

Tyler


1975 Glenbrook, 1978 Royale rear bath Raleigh, NC
Re: [GMCnet] 1975 GMC Eleganza Barn find [message #332319 is a reply to message #332308] Sat, 19 May 2018 19:20 Go to previous messageGo to next message
ljdavick is currently offline  ljdavick   United States
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
Senior Member
For me - the first thing I’d do is check the back frame for rust. If the frame where the bogies mount is badly rusted then the coach is more lawn ornament than moving vehicle.

Then worry about gas, brakes, etc.,

Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, CA
Howell EFI + EBL + Electronic Distributor

> On May 19, 2018, at 12:16 PM, BC wrote:
>
> Hi everyone,
>
> I'm new to the site!
>
> Came across this unit & am seriously thinking about buying it. Seems to be in good shape but hasn't ran in a few years & hasn't really been used much
> the last 6 years. Was able to get it started with some fresh gas in the carb - but won't keep running - stinks like turpentine. Any good ideas on
> how to get the bad fuel out of the system?
>
> Another question - can you pump the air suspension up without running the compressor/pump?
>
> Thanks,
> Would like to post some pics but doesn't seem to be an easy way to do this!
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
Re: 1975 GMC Eleganza Barn find [message #332320 is a reply to message #332308] Sat, 19 May 2018 19:59 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
Senior Member
I am working on one that sat for 19 years with 1/2 full tanks. Getting it running is my first priority. So I got a boat tank and plumbed it in to the system just before the mechanical fuel pump mounted on the right front of the engine. It would not start so I disconnected the fuel line at the carb. Then I fashioned a short 3/8 line stub to thread directly into the carb. Then I gravity filled the carb with one can of pure carb cleaner and let it sit for 24 hours. Then I changed the fuel line back to normal which is fed by the mechanical fuel pump. I hooked the input side of the fuel pump directly to the boat tank using a temporary clear piece of 3/8" hose so I could see the fuel and started cranking. It took a minute or so of cranking to get all of the carb clean out of the carb and after that it immediately started. The thing now starts and runs like a top. I have never run it off of the coach tanks because that is another project and I have other more pressing ones like getting the brakes going.

Ken B

at the Eastern states work rally.


Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
Re: [GMCnet] 1975 GMC Eleganza Barn find [message #332321 is a reply to message #332319] Sat, 19 May 2018 20:16 Go to previous messageGo to next message
ljdavick is currently offline  ljdavick   United States
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
Senior Member
"For me - the first thing I’d do is check the back frame for rust. If the frame where the bogies mount is badly rusted then the coach is more lawn ornament than moving vehicle. Then worry about gas, brakes, etc.”

— said the man who bought his coach site-unseen, 1,800 miles away, from eBay…

I forgot about that part.

“Do as I say, not as I do”?

Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, CA
Howell EFI + EBL + Electronic Distributor

> On May 19, 2018, at 5:20 PM, Larry Davick wrote:
>
> For me - the first thing I’d do is check the back frame for rust. If the frame where the bogies mount is badly rusted then the coach is more lawn ornament than moving vehicle.
>
> Then worry about gas, brakes, etc.,
>
> Larry Davick
> A Mystery Machine
> 1976(ish) Palm Beach
> Fremont, CA
> Howell EFI + EBL + Electronic Distributor
>
>> On May 19, 2018, at 12:16 PM, BC wrote:
>>
>> Hi everyone,
>>
>> I'm new to the site!
>>
>> Came across this unit & am seriously thinking about buying it. Seems to be in good shape but hasn't ran in a few years & hasn't really been used much
>> the last 6 years. Was able to get it started with some fresh gas in the carb - but won't keep running - stinks like turpentine. Any good ideas on
>> how to get the bad fuel out of the system?
>>
>> Another question - can you pump the air suspension up without running the compressor/pump?
>>
>> Thanks,
>> Would like to post some pics but doesn't seem to be an easy way to do this!
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org


Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
Re: 1975 GMC Eleganza Barn find [message #332322 is a reply to message #332320] Sat, 19 May 2018 20:45 Go to previous messageGo to next message
GMC2000   United States
Messages: 193
Registered: March 2018
Location: Georgia
Karma: -3
Senior Member
Ken Burton wrote on Sat, 19 May 2018 19:59
I am working on one that sat for 19 years with 1/2 full tanks. Getting it running is my first priority. So I got a boat tank and plumbed it in to the system just before the mechanical fuel pump mounted on the right front of the engine. It would not start so I disconnected the fuel line at the carb. Then I fashioned a short 3/8 line stub to thread directly into the carb. Then I gravity filled the carb with one can of pure carb cleaner and let it sit for 24 hours. Then I changed the fuel line back to normal which is fed by the mechanical fuel pump. I hooked the input side of the fuel pump directly to the boat tank using a temporary clear piece of 3/8" hose so I could see the fuel and started cranking. It took a minute or so of cranking to get all of the carb clean out of the carb and after that it immediately started. The thing now starts and runs like a top. I have never run it off of the coach tanks because that is another project and I have other more pressing ones like getting the brakes going.

Ken B

at the Eastern states work rally.


good ole chemical rebuild.. not all carb cleaners are all theyre cracked up to be these days though. FWIW Ive found yamalube brand combustion chamber cleaner is the best stuff for chemical carb rebuilds.

its some really good stuff for dissolving fuel varnish.
Re: 1975 GMC Eleganza Barn find [message #332352 is a reply to message #332308] Sun, 20 May 2018 18:19 Go to previous message
Woodstock is currently offline  Woodstock   United States
Messages: 2
Registered: May 2018
Location: Lander, WY
Karma: 0
Junior Member
Good stuff guys!

Thanks
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